ZnO@ZIF-8 core-shell microspheres for improved ethanol gas sensing

Ren, Guojian; Li, Zhimeng; Yang, Weiting; Muhammad, Faheem; Xing, Jianbo; Zou, Xiaoqin; Pan, Qinhe; Zhu, Guangshan; Du, Yu

doi:10.1016/j.snb.2018.12.145

Cited by 128 publications

(42 citation statements)

References 46 publications

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“…Additionally, MOFs‐based composites also can be utilized to detect VOCs because of their sensitive and selective adsorption ability 9–11 . It has been demonstrated that the ZnO@ZIF‐8 core‐shell materials were efficient in sensing ethanol than the pristine ZnO microsphere and ZIF‐8 12 . Besides the MOFs‐based hybrid materials, MOFs‐derived materials gifted with hierarchically porous structures and actively heteroatoms‐doped sites provide a rich platform for functionally tailored adsorbents toward applications in VOCs adsorption, conversion, and detection 13–19 .…”

Section: Introductionmentioning

confidence: 99%

Hierarchically porous N‐doped carbon nanofibers derived from ZIF‐8/PAN composites for benzene adsorption

Xing

Chen

et al. 2020

J of Applied Polymer Sci

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Coupling with electrospinning technique, metal–organic‐frameworks (MOFs)‐derived porous carbon fibers exhibit a great potential application in the adsorption of volatile organic compounds (VOCs) because of their huge surface area, high porosity, as well as sufficient heteroatom‐doped active sites. In this work, the hierarchically porous N‐doped carbon nanofibers are obtained after the pyrolysis of zeolite imidazole framework‐8 and polyacrylonitrile (ZIF‐8/PAN) composite fibers synthesized by electrospinning method. The N‐doped carbon nanofibers fabricated in N2 atmosphere (N‐CF‐N2) present an enhanced adsorption capacity of 694 mg/g for benzene because of the synergistic effect of the hierarchically porous structure and the abundant N‐species‐containing active sites. It is also interesting that the N‐doped hierarchical carbon nanofibers fabricated in Ar atmosphere (N‐CF‐Ar) exhibit a low benzene adsorption as compared with the N‐CF‐N2, which can be attributed to the porous structure damage caused by the bombardment of heavy Ar atoms on the pore shells during the pyrolysis. These results not only show a promising application of the as‐fabricated N‐CF‐N2 in adsorption of VOCs for air purification due to its merit of cost‐efficient, large‐scale production, and excellent adsorption capacity, but also expand the potential of electrospinning technology and composite fibers in volatile organic gas adsorption.

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Section: Introductionmentioning

confidence: 99%

Hierarchically porous N‐doped carbon nanofibers derived from ZIF‐8/PAN composites for benzene adsorption

Xing

Chen

et al. 2020

J of Applied Polymer Sci

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“…It is widely used in the fields of solar cells, [8] light‐emitting diodes, [9] piezoelectric devices [10] and gas sensors [11] . As wurtzite crystal, ZnO has three rapid growth directions, which leads to the diversity of its morphology, such as: nanosheet, nanoparticle, nanorod, nanowire, macroporous honeycomb‐like, core‐shell microspheres etc [5,12a,b,c,d,e] . In addition, ZnO exhibits excellent physical and chemical stability, which is important for practical sensing material.…”

Section: Introductionmentioning

confidence: 99%

Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

117

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Gas sensors based on metal oxides semiconductor (MOS) have attracted extensive attention from both academic and industry. ZnO, as a typical MOS, exhibits potential applications in toxic gas detection, owning to its wide band gap, n-type transport characteristic and excellent electrical performance. Meanwhile, doping is an effective way to improve the sensing performance of ZnO materials. In this review, the effects of different types of doping on morphology, crystal structure, band gap and depletion layer of ZnO materials are comprehensively discussed. Theoretical analysis on the strategies for enhancing the sensing properties of ZnO is also provided. This review puts forward the reasonable insight for designing efficient n-type ZnO-based semiconductor oxide sensing materials.

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“… 35 , 36 In recent years, ZIF-67 (cobalt-based MOF) has attracted attention as a material with excellent gas absorption properties. 36 − 42 To cite an example, ZnO nanorod-coated ZIF-67 has been proposed for the selective detection of formaldehyde. 39 Interestingly, this study reported an unresponsive behavior of ZIF-67 toward NH 3 .…”

Section: Introductionmentioning

confidence: 99%

Chemoresistive Room-Temperature Sensing of Ammonia Using Zeolite Imidazole Framework and Reduced Graphene Oxide (ZIF-67/rGO) Composite

et al. 2020

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The present work demonstrates the application of a composite of the zeolite imidazole framework (ZIF-67) and reduced graphene oxide (rGO), synthesized via a simple hydrothermal route for the sensitive sensing of ammonia. The successful synthesis of ZIF-67 and rGO composite was confirmed with structural and spectroscopic characterizations. A porous structure and a high surface area (1080 m 2 g –1 ) of the composite indicate its suitability as a gas sensing material. The composite material was coated as a thin film onto interdigitated gold electrodes. The sensor displays a change in its chemoresistive property (i.e., resistance) in the presence of ammonia (NH 3 ) gas. A sensor response of 1.22 ± 0.02 [standard deviation (sd)] is measured for 20 ppm of NH 3 , while it shows a value of 4.77 ± 0.15 (sd) for 50 ppm of NH 3 . The fabricated sensor is reproducible and offers a stable response, while also providing tolerance against humidity and some other volatile compounds. The average response and recovery times of the sensor, for 50 ppm NH 3 concentration, are found to be 46.5 ± 2.12 (sd) and 66.5 ± 2.12 (sd) s, respectively. The limit of detection of the sensor was found to be 74 ppb.

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ZnO@ZIF-8 core-shell microspheres for improved ethanol gas sensing

Cited by 128 publications

References 46 publications

Hierarchically porous N‐doped carbon nanofibers derived from ZIF‐8/PAN composites for benzene adsorption

Hierarchically porous N‐doped carbon nanofibers derived from ZIF‐8/PAN composites for benzene adsorption

Advances in Doped ZnO Nanostructures for Gas Sensor

Chemoresistive Room-Temperature Sensing of Ammonia Using Zeolite Imidazole Framework and Reduced Graphene Oxide (ZIF-67/rGO) Composite

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